Linear Ball Bearing, System of Measurement Metric, Inside Diameter 20 mm, Outside Diameter 32 mm, Self-Alignment Self-Aligning, Overall Length 45 mm, Dynamic Load Capacity 473 lbf, Material Delrin/Steel, Series Super, Steady State Speed 3 mm/sec, Maximum Operating Temperature 185 Degrees F, Minimum Operating Temperature 0 Degrees F, Accelerated Speed 150 mm/sq sec, Slot Width 10.5 mm